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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. 1. brain function - 2. blood flow - 3. willing female






2. Produce testosterone. located between the seminiferous tubules






3. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






4. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.






5. (LH) causes female's egg to break (her period)






6. 283 days






7. When are steers and heifers weaned from bottle feeding?






8. 1-2 days






9. 19-23 (21) days






10. Failure to have both testis (gonads) descend






11. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total






12. Provide nourishment for the developing sperm






13. Microscopic - make sure not sterile - very few bulls are actually tested






14. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.






15. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase






16. Luteolysis happens because of the ____________ hormone






17. ~305 days (altough often longer due to breeding difficulties)






18. (FSH) causes egg to mature in females






19. % of fat in milk. makes cheeses and ice cream. regulates cost of milk






20. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.






21. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.

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22. ~305 days (altough often longer due to breeding difficulties)






23. Sperm is produced here






24. Sperm production






25. Not under a timeline - cow can not be sold as steak






26. Sperm is produced here






27. The more stressed out the male is - the less sperm he is going to produce






28. Way to know everything is alright with the breeding male






29. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).






30. FEED






31. What helps regulate spermatogenesis?






32. 1-3 days






33. Male on one pin and female on other side






34. Provide nourishment for the developing sperm






35. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %






36. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total






37. Microscopic - make sure not sterile - very few bulls are actually tested






38. Can survive ~7 days in cow. vast majority <48 hours






39. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co






40. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.






41. Animals which have only one estrous cycle (ex: dog - fox)






42. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)






43. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers






44. Milk ~305 days - dry 60 days prior to calving






45. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






46. 265-285 days






47. 14-19 (17) days






48. 114 days






49. Duct through penis that carries sperm and urine






50. Start of the reproductive tract for the female. located outside of the body